1 B20352 ECN-11293 (0201)

Installation and Operating Instructions For FULLY AUTOMATIC CHANGEOVER MANIFOLD

FHM2, FHM2HL, & FHM2HP SERIES

INTRODUCTION Western manifold systems are cleaned, tested and prepared for the indicated gas service and are built following National Fire Protection Association and Compressed Gas Association guidelines. The manifold consists of a manifold control unit, an internal dual line assembly, and two supply bank headers, one service and one secondary supply to provide an uninterrupted supply of gas for the specific gas application. The manifold control unit is designed and built with features providing automatic changeover from the depleted “Service” supply bank to the “Secondary” supply bank while maintaining a constant delivery pressure. Digital pressure readouts, alarm, signal connections and lights show system status and alert the need to replace depleted cylinders. Features of the automatic system include integral adjustable line regulators, power supply with dry contacts for connecting to a remote alarm, stainless steel braided flexible pigtails with check valves, rigid wall-mounted headers, and complete mounting hardware.

CAUTION Failure to follow the subsequent instructions can result in personal injury or property damage: • Never permit oil, grease, or any other combustible material to come in contact with cylinders, manifold,

and connections. Oil and grease may react and ignite while in contact with some gases- particularly oxygen and nitrous oxide.

• Cylinder, header, and master valves should always be opened very s-l-o-w-l-y. Heat of recompression

may ignite combustible materials. • Pigtails should never be kinked, twisted, or bent into a radius smaller than 3 inches. Mistreatment may

cause the pigtail to burst. • Do not apply heat. Some materials may react and ignite while in contact with some gases–particularly

oxygen and nitrous oxide. • Cylinders should always be secured with racks, chains, straps, or stands. Unrestrained cylinders may fall

over and damage, or break off the cylinder valve, which may propel the cylinder with great force. • Oxygen manifolds and cylinders should be grounded. Static discharges and lightning may ignite materi-

als in an oxygen enriched atmosphere, creating a fire or explosion. • Welding should not be performed near nitrous oxide piping. Excessive heat may cause the gas to

dissociate, creating an explosive force.

WARRANTY All Western manifolds are warranted against defects in materials and workmanship for the period of one year from date of purchase. See back cover for details of limited warranty.

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LEFT BAN K RIG H T BAN K

SYSTEM N O RM AL

W ESTERN INNO VATOR875 BASSETT ROAD

W ESTLAKE, OHIO 441451-800-783-7890

FH M 2FULLY AUTO M ATIC HEALTH CARE G AS M ANIFO LD

BAN K DEPLETED BAN K DEPLETED

READY FO R USE READY FO R USE

IN SERVICEIN SERVICE

2 B20352 ECN-11293 (0201)

TABLE OF CONTENTS GENERAL INSTRUCTIONS ...................................................................................................................................... 3 COMPONENTS ......................................................................................................................................................... 4 CONTROL SECTION INSTALLATION ...................................................................................................................... 5 HEADER INSTALLATION ......................................................................................................................................... 6 CONNECTING TO THE DELIVERY PIPELINE ........................................................................................................ 7 RELIEF VALVE VENT LINE ...................................................................................................................................... 7 ELECTRICAL ............................................................................................................................................................. 8 REMOTE ALARM HOOKUP ...................................................................................................................................... 9 INSTALLING PIGTAILS AND ATTACHING CYLINDERS ...................................................................................... 10 START UP AND SYSTEM CHECKING PROCEDURES ........................................................................................ 11 ELECTRICAL POWER UP ...................................................................................................................................... 12 LINE DELIVERY PRESSURE ADJUSTMENT ........................................................................................................ 13 MANIFOLD OPERATION ........................................................................................................................................ 14 FHM2HL MODELS FOR USE WITH CARBON DIOXIDE AND NITROUS OXIDE ................................................ 14 CYLINDER REPLACEMENT AND HANDLING ...................................................................................................... 15 GENERAL MAINTENANCE ..................................................................................................................................... 15 TROUBLESHOOTING ............................................................................................................................................. 16 MANIFOLD MAINTENANCE ................................................................................................................................... 18 REPLACEMENT PIGTAILS ........................................................................................................................ 18 PCB REPLACEMENT PARTS ................................................................................................................... 18 PRESSURE GAUGES ................................................................................................................................ 18 VALVES AND VALVE REPAIR KITS ......................................................................................................... 18 PRESSURE SWITCH REPLACEMENT PARTS ........................................................................................ 18 POWER SUPPLY REPLACEMENT PARTS .............................................................................................. 18

PRESSURE TRANSDUCERS .................................................................................................................... 18

REGULATOR AND REGULATOR REPAIR KITS ...................................................................................... 19 WARRANTY ............................................................................................................................................................. 20

3 B20352 ECN-11293 (0201)

GENERAL INSTRUCTIONS Manifolds should be installed in accordance with guidelines stated by the National Fire Protection Association, Compressed Gas Association, Occupation Safety Health Administration, and all applicable local codes. The carbon dioxide and nitrous oxide manifolds should not be placed in a location where the temperature will exceed 120° F (49° C) or fall below 20° F (-7° C). The manifolds for all other gases should not be placed in a location where the temperature will exceed 120° (49° C) or fall below -20° F (-29° C). A manifold placed in an open location should be protected against adverse weather conditions, including direct rain, snow, and heavy moisture. During winter, pro-tect the manifold from ice and snow. In summer, shade the manifold and cylinders from continuous exposure to di-rect rays, heat of the sun, and rain. Leave all manifold protective covers in place until their removal is required for installation. This precaution will keep moisture and debris from the piping interior, avoiding operational problems and system contamination. All safety relief valves shall be piped/vented to the outside. Follow all local and applicable codes for piping systems.

LIN E PRESSURE

LEFT BAN K RIG HT BAN K

SYSTEM N O RM AL

W ESTERN IN N O VATO R875 BASSETT RO AD

W ESTLAKE, O HIO 441451-800-783-7890

FH M 2FULLY AUTO M ATIC HEALTH CARE GAS M ANIFO LD

BA N K D EPLETED BA N K D EPLETED

READ Y FO R U SE READ Y FO R U SE

IN SERVICEIN SERVICE

Total number of cylinders 4 6 8 10 12

Overall manifold length 5’ - 11” 7’ - 7” 9’ - 3” 10” - 11” 12’ - 7”

Figure I

Example FHM2-9-4

Overall Manifold Length

Manifold Cabinet Installed Depth 10”

16”

19”

10” Typ. 45”

CAUTION: • Remove all protective caps from the pigtails and manifold. If left in place, the protective cap may ignite

due to heat of recompression in oxygen systems.

4 B20352 ECN-11293 (0201)

FHM2 COMPONENTS 1. Verify that all components below have been received. If any of these items are missing or damaged, please

notify your supplier immediately.

FULLY AUTO M ATIC HEALTH CARE G AS M ANIFO LD

FH M 2875 BASSETT RO AD

W ESTLAKE, O HIO 441451-800-783-7890

W ESTERN INN O VATO R

RIG HT BAN K

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BAN K DEPLETED

IN SERVICEIN SERVICE

LEFT BAN K

BAN K DEPLETED

READ Y FO R U SE SYSTEM N O RM AL

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Cabinet Manifold Quantity = 1

Bracket Quantity = 1

(Attached to the back of the mani-fold)

Pigtails Quantity = Should match the number of ports on

the headers Headers

Quantity = 1 left side 1 right side

Brackets Quantity = Varies

Outlet Fitting & Union Quantity = 1

5 B20352 ECN-11293 (0201)

CONTROL SECTION INSTALLATION 1. Determine and mark the vertical center line for installation of the manifold control unit. (Figure 2). 2. Measure from the floor to a point 63.5” in height* of this vertical

line. Using a level, mark a horizontal line at this point extending approximately 10” to the left and 10” to the right of center. (*Suggested manifold height. Wall mounting heights may vary from

one installation to another depending on available space, cylinder height, etc.)

3. Center the mounting bracket on the vertical line, aligning the top 2 mounting holes with the horizontal line (Figure 3). 4. Holding the bracket as shown in Figure 3 mark the locations for the 5 fasteners. 5. Anchor the mounting bracket to the wall. These fasteners are not provided with the manifold. The type fastener used shall be selected based on the wall type.

6. Secure the mounting bracket to the manifold control unit by sliding the round retainers on the back of the cabinet into the

slots on the bracket. Place the nut on the bolt which protrudes from the case and tighten lightly. This bolt only stabilizes the bottom of the unit and is not load-bearing (the nut is shipped threaded to the bolt). (Figure 4)

63.5

Spirit

Center Line

Floor

Figure 2

Figure 3

Figure 4

Retainers

Mounting Brackets

Control

Nut

CAUTION: • The manifold weighs 65 – 70 lbs. The fasteners chosen shall be sized to hold the weight of the

manifold. Undersized fasteners could allow the manifold to fall off the wall which could cause injury.

6 B20352 ECN-11293 (0201)

HEADER INSTALLATION

NOTE: • Half of the brackets will be used on the left side while half will be used on the right side.

1. Attach the left header to the union on the left side of the

manifold control unit. Using a level, mark the placement of mounting brackets while keeping the header on a horizontal plane.

(Figure 5) 2. Position the brackets so that the top of the bracket is aligned with the bottom of the headers and is centered between the cylinder connections. The brackets

should be evenly spaced with the end bracket placed as close to the last cylinder as possible to provide the most support and stability.

(Figure 6) 3. Mark the mounting hole and install fasteners suitable for

type of wall construction. (Figure 6) 4. Fit the U-bolt over the header piping, through the

bracket strap, and tighten the two mounting nuts. (Figure 6)

Figure 6

U-Bolt

Mounting Bracket

Header Assembly

Fastener

Figure 5

Header Union

Header Assembly

Spirit Level

Strap

Mounting Nut

7 B20352 ECN-11293 (0201)

CONNECTING TO THE DELIVERY PIPELINE 1. An outlet union is supplied with the manifold. The 1/2 NPT end of the outlet fitting shall be attached to the

delivery piping using Teflon® tape. (Figure 7) 2. Connect the outlet union to the manifold outlet nut and nipple. (Figure 7) 3. A source valve shall be located near the manifold outlet per current requirements of NFPA 99, section 4-

3.1.2.3. RELIEF VALVE VENT LINE

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FH M 2875 BASSETT RO AD

W ESTLAKE, O HIO 441451-800-783-7890

W ESTERN IN N O V ATO R

RIG H T BAN K

REA DY FO R USE

BAN K D EPLETED

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Relief Valve Outlet

Relief Valve Vent Line

Source Valve

Delivery Pipeline

1/2 NPT Adaptor

Figure 7

Outlet Union

NOTE: • If the manifold is installed indoors, vent piping must be attached to the manifold relief valve outlet.

The vent piping shall be routed outdoors per applicable piping codes.

CAUTION: • Any brazing performed on the delivery pipeline or relief valve vent line shall be done following the guide-

lines outlined in the current NFPA 99 Section 4-3 requirements.

1. The relief valve outlet union is supplied to connect to the vent piping. The 1/2 NPT relief valve union shall be attached to the vent piping using Teflon® tape. (Figure 7)

2. Connect the relief outlet fitting to the manifold. Thread the compression fitting nut until it is finger tight. Then

tighten, using a 11/16 wrench, 1-1/4 turns.

8 B20352 ECN-11293 (0201)

ELECTRICAL

CAUTION: • Turn off all power while connecting and wiring the power supply.

1. A 24 VAC power supply transformer is furnished with the manifold control unit. Mount the box onto the wall,

to the left of the manifold, with the top edge approximately aligned with top of the control unit. The attached control cable terminates into a 7 prong plug matching a receptacle on the left side of the control unit, (Figure 8).

2. After mounting the power supply box to the wall, plug the cable into the control unit receptacle.

FULLY AUTO M ATIC HEALTH CARE G AS M ANIFO LD

FH M 2875 BASSETT ROAD

W ESTLAKE, O HIO 441451-800-783-7890

W ESTERN IN NO VATO R

RIG H T BAN K

READY FO R USE

BANK DEPLETED

IN SERVICEIN SERVICE

LEFT BAN K

BANK DEPLETED

READY FO R USE SYSTEM NO RM AL

LIN E PRESSURE

Figure 8

Figure 9

Power Supply Box

Manifold Cable (grey)

7 Prong Connector

Manifold Control Unit

Ground wire (from 115 VAC supply)

Connect black and white wires (from 115 VAC supply) to either black wire in the power supply.

115 VAC Conduit

3. The center hole on the underside of the power supply box provides access for conduit and connection of 115

VAC power. Connect the 115 VAC black and white leads to the power supply as shown. (Figure 9)

4. Connect the ground wire to the ground terminal as shown in figure 9. 5. After completing the 115 VAC connections, the power supply should be completely installed and 115 VAC

power can be applied. 6. Manifolds with heater have a 3 prong cord that should be plugged into a standard 115 VAC that can provide

4 AMPS.

9 B20352 ECN-11293 (0201)

In some instances the power supply for the remote alarm is normally part of the electrical contract on proposed constructions and should exist in any furnished facility. The following procedure should be followed: 1. Two alarm signal wire requiring dry contacts should run to the manifold location. 2. Connect one signal wire to the common (C) terminal and the other signal wire to the normally

open (N/O) terminal on the terminal strip on the right

side in the power supply box. (Figure 10)

REMOTE ALARM HOOKUP A five terminal remote alarm terminal strip is on the right side of the circuit board in the power supply box for remote alarm interfacing. The top three terminals on the strip (N/C, N/O, and C) provide dry contacts for remote alarm hookup. Wiring diagrams for remote audio/visual alarms are included with the alarms. Listed below are four different remote alarm configurations. Terminals identified as N/O and N/C have been marked in the unactuated state.

If the remote alarm is designed for 24 VAC operation, then connect the alarm as follows: (Also see WESTERN’S ALARM section on next page) 1. Connect the ground wire from the alarm to one 24 VAC terminal

on the right side of the circuit board in the power supply

box. (Figure 11) 2. A jumper wire is connected between

the other 24 VAC terminal and the common (C) terminal.

3. Connect the “reserve in use” signal wire to the (N/C)

terminal.

4. If a “system normal” signal is also employed, connect that signal wire to the normally open (N/O) terminal.

If the remote alarm is designed for voltages other than 24 VAC, then connect the alarm as follows: 1. Connect the ground wire from the alarm to the negative (-) connection at the

power source. (Figure 12) 2. There should be NO connections to the 24 VAC terminals on the right side of the circuit board. 3. Connect the positive (+) connection

from the power source to the common (C) terminal on the circuit board.

4. Connect the “reserve in use” signal wire to the

normally closed (N/C) terminal. 5. If a “system normal” signal is also employed, connect that signal wire to the normally open (N/O) terminal.

N/C

N/OC24

VAC

M.BM.NB13U@B

Figure 10

Figure 11

Figure 12

10 B20352 ECN-11293 (0201)

WESTERN’S ALARM 1. Connect one 24 VAC lead from the alarm to one 24 VAC terminal on the right side of the circuit board in the power supply box. (Figure 13) 2. Connect the other 24 VAC lead from the alarm to the other 24 VAC terminal. 3. A jumper wire is connected between one 24 VAC terminal and the common (C) terminal. 4. Connect the alarm signal wire to the normally open (N/O) terminal.

N/C

N/O

C

24 VAC

Figure 13

INSTALLING PIGTAILS AND ATTACHING CYLINDERS 1. Remove plastic protective covers from all pigtails. 2. Establish flow direction of check valve in pigtails. 3. Connect pigtails to header check valve outlet bushing with direction of check valve flow from cylinder to manifold end of

pigtail (the check valve end of the pigtail should be connected to the cylinder). (Figure 14) 4. Check master valves to verify that they are open (turn counter-clockwise to open). 5. Remove protective cylinder caps from full replacement cylinders. With the valve outlet pointed away from you

or anyone else, slowly open each cylinder valve slightly to blow out any dirt or contaminants which may have become lodged into the cylinder valve.

6. Place and secure full cylinders into position using chains, belts, straps, or cylinder stands. 7. Connect pigtails to cylinder valves and tighten securely. 8. S-L-O-W-L-Y turn each cylinder valve until each cylinder is fully open.

CAUTION: • Pigtails should never be kinked, twisted, or bent in a radius smaller than 3 inches. Mistreatment may cause

pigtail to burst (refer to attached caution tags on each pigtail).

Figure 14

Jumper Wire

Check Valve

9. Check all cylinder and pigtail connections for leaks using Western leak detector LT-100 or an oxygen safe

equivalent solution. 10. Observe the following conditions:

• The line pressure will be indicated on the front of the cabinet. • The pressure reading on each bank being pressurized will display cylinder pressure. • The green “In Service” and yellow “Ready for Use” lights are illuminated when both banks are full.

11 B20352 ECN-11293 (0201)

START UP AND CHECKING PROCEDURE 1. S-L-O-W-L-Y open one cylinder valve on the right bank (turn counter-clockwise to open). The right bank

pressure gauge should show the full pressure of the right bank of cylinders. The red “Depleted Bank” light on the right bank will be extinguished.

2. S-L-O-W-L-Y open one cylinder valve on the left bank. The left bank pressure gauge will show the full pres-

sure of the left bank of cylinders. The yellow “Ready for Use” light comes on, extinguishing the red “Depleted Bank” light, on the left side.

3. Create a slight flow of gas by opening the bleeder valve inside the manifold. Close the right cylinder valve to

simulate a depleting right bank. (see Figure 15) Observe the following: • The right bank pressure slowly falls and the manifold control automatically switches over to the left bank. • Delivery pressure remains constant. • Green “In Service” light is extinguished. • Red “Replace Depleted Bank” light on the right bank illuminates. • Any remote alarms should be activated at this time. • The left bank green “In Service” light comes on, extinguishing the yellow “Ready for Use” light.

4. S-L-O-W-L-Y reopen the right cylinder valve. Observe the following: • Right bank pressure returns to full pressure. • Yellow “Ready for Use” light illuminates. • Red “Depleted Bank” light is extinguished. • Any remote alarms should be canceled.

5. Repeat procedures 3 & 4 simulating an empty left bank.

Figure 15

Bleeder Valve

12 B20352 ECN-11293 (0201)

ELECTRICAL POWER-UP 1. When power is applied to the manifold, the displays will first cycle through a power up sequence before

displaying the pressures. This process takes approximately 16 seconds. • All of the Status indication lights will be lit. • The lights will go out sequentially. • The state of the DIP switches will be shown on the digits of the right bank display and the right most digit

to the left of the left bank display as a series of “1”s and “0” s. • The display will show all “8”. • Each digit of the display will be lit individually.

2. The displays and status indicators will then be allowed to operate normally. UNITS OF MEASURE 1. The FHM2 manifold can be configured to display pressure in

PSI, KPa or BAR. The manifold is shipped with PSI as the default unit of measure. To switch the units, proceed to step 2. If PSI units are desired, no changes are necessary and step 2 may be skipped.

2. To change the units, perform the following steps:

• Remove power to the manifold (switches are only read during power-up).

• Open the door of the manifold. • Locate the DIP switches at the bottom edge of the PC Board

on the door.

• For PSI set the switches as shown: Model FHM2 Model FHM2HL Model FHM2HP: • For KPa set the switches as shown: Model FHM2 Model FHM2HL Model FHM2HP: • For BAR set the switches as shown: Model FHM2 Model FHM2HL Model FHM2HP:

• Close the cover and reconnect power to the manifold. • Verify that during power-up the status of the switches are displayed on the digits of the right bank display

and the right most digit of the left bank display as a series of “1”s and “0”s as follows:

Switches

Switch Position

13 B20352 ECN-11293 (0201)

DIP SWITCH/DISPLAY OPTION • For PSI: Model FHM2 Model FHM2HL Model FHM2HP: Left Display Right Display Left Display Right Display Left Display Right Display • For KPA; Model FHM2 Model FHM2HL Model FHM2HP: Left Display Right Display Left Display Right Display Left Display Right Display • For BAR: Model FHM2 Model FHM2HL Model FHM2HP: Left Display Right Display Left Display Right Display Left Display Right Display

LINE DELIVERY PRESSURE ADJUSTMENT The delivery pressure has been factory set. If adjustment is required, carefully proceed according to the following instructions: 1. Leave the manifold in full operational status. 2. Create a flow condition in the delivery pipeline system. 3. Locate the left or right line pressure regulator that is feeding the system (open ball valves). 4. Adjustment: Turn clockwise to “increase” pressure, turn counter-clockwise to “decrease” pressure. * Refer to either the line pressure gauge on outlet block or the LED display on the front of the manifold door. 5. Close door and latch.

14 B20352 ECN-11293 (0201)

Figure 16 Right Primary

Regulator Left Primary

Regulator

MANIFOLD OPERATION The manifold control unit includes the following components and features: green “In Service”, yellow “Ready for Use”, and red “Bank Depleted” indicator lights”, digital cylinder pressure readouts, digital line pressure readout and gauge, intermediate pressure gauge, internal dual line regulator assembly, intermediate relief valves, line relief valve, and fully automatic bank switching. Supply bank consist of a header with 24” and/or 36” stainless steel flexible pigtails with check valves, individual header check valve outlet bushings, master shut off valves, and union connections for attachment to the control unit. After initial powerup and with both banks empty, both read and green LED’s will be illuminated. The bank that is pressurized first will be considered in service. The cylinder bank that supplies the piping system is known as the “Service” supply (as indicated by the green “in Service“ light), while the cylinders on stand-by are referred to as the “Secondary” supply (as indicated by the yel-low “ready for use“ light. On the service bank, the gas flows into the manifold control unit inlet to the bank pres-sure transducer, then into the primary regulator before heading into an intermediate gauge. The gas then flows through a solenoid valve and into the dual line assembly. The valves leading to one line regulator should be closed. This regulator is to be used as an emergency back up. The gas flows through the open valve leading to the other line regulator. Delivery pressure is controlled by the line regulator and is adjustable (See Delivery Line Adjustment– page 13). The gas exits the line regulator and proceeds past the line pressure transducer and pres-sure gauge and into the delivery piping. The gas on the secondary bank flows into the manifold cabinet to the bank pressure transducer. The gas then flows through the primary regulator and into an intermediate gauge. The gas then enters a solenoid. Since this is the secondary bank, the solenoid is closed, preventing the secondary bank from flowing. Changeover from the “Service” to “Secondary” side is accomplished when the service pressure drops below a predetermined point (this changeover pressure is determined by the manifold PCB). The PCB then signals the secondary bank solenoid to open, allowing it to start to flow without any interruption in line delivery pressure. There are two definite indicators as to which bank should be changed; (1) red “Bank Depleted” light and (2) cyl-inder bank pressure readout. After replacing empty cylinders, open the cylinder valves. The PCB will read this pressure and automatically place the fresh bank of cylinders into reserve, making it the secondary bank. The yellow light will come on indi-cating the new bank is ready for use, and the red “Bank Depleted” light will be extinguished. Replacing the empty cylinders is all that is required to reset the manifold. To insure proper operation, observe the following guidelines: 1. Carefully follow all instructions. 2. Establish proper flow direction of check valves. 3. Be sure cylinder valves are fully opened. 4. Replace depleted cylinders as soon as practical after the red “Bank Depleted” light comes on. FHM2HL – MODELS FOR USE WITH CARBON DIOXIDE AND NITROUS OXIDE GAS. Nitrous Oxide and Carbon Dioxide systems include a 500 SCFH capacity heater. The thermostatically controlled heater warms the gas before entering the regulator, preventing regulator and system “freeze-up”. The control is supplied with a 7 foot cord and plug for 115 VAC power and draws 4 AMPS.

Line Pressure Transducer

Pressure Gauge Line Relief Valve

Ball Valve

Check Valve

Intermediate Pressure Gauges

Line Regulators

Solenoid Valves

Solenoid Bypass Valve

Solenoid Bypass Valve

Check Valve Check Valve

Ball Valve

Pressure Transducer Pressure Transducer

Pressure Switches

Bleeder Valve

Intermediate Relief Valve Intermediate Relief Valve

15 B20352 ECN-11293 (0201)

CYLINDER REPLACEMENT & HANDLING 1. Shut off all cylinder valves and header valves as well as the master valve on depleted cylinder bank. 2. S-L-O-W-L-Y loosen and remove the pigtail connection from the depleted cylinders. 3. Remove depleted cylinders and replace protective caps. 4. Remove protective cylinder caps from full replacement cylinders. With the valve outlet pointed away from

you or anyone else, slowly open each cylinder valve slightly to blow out any dirt or contaminants which may have become lodged into the cylinder valve.

5. Place and secure full cylinders into position using chains, belts, straps, or cylinder stands. 6. Connect pigtails to cylinder valves and tighten securely. 7. S-L-O-W-L-Y open master valves. 8. S-L-O-W-L-Y turn each cylinder valve until each cylinder is fully open (turn counter-clockwise to open). 9. Check all cylinder/pigtail connections for leaks using Western Leak Detector, LT-100 or an equivalent

oxygen safe solution. Repair or replace any connections that show signs of bubbles which indicates leak-age.

10. Observe the following conditions: • The pressure reading on the bank being pressurized will display cylinder pressure. • The red “Bank Depleted” light goes out and the yellow “Ready for Use” light come on. • No interruption in gas service or line pressure.

GENERAL MAINTENANCE 1. Main Section a) Daily – record line pressure b) Monthly 1) Check regulators, valves and compression fittings for external leakage. 2) Check valves for closure ability. c) Annually 1) Check relief valve pressures. 2) Replace regulator seats. 2. Manifold Header a) Daily – observe nitrous oxide and carbon dioxide systems for cylinder frosting or surface condensation. Should excessive condensation or frosting occur, it may be necessary to increase manifold capacity. b) Monthly 1) Inspect valves for proper closure. 2) Check cylinder pigtails for cleanliness, flexibility, wear, leakage, and thread damage. Replace

damaged pigtails immediately. 3) Inspect pigtail check valves for closure ability. c) Every Four Years 1) Replace all pigtails.

CAUTION: • Pigtails should never be kinked, twisted, or bent into a radius smaller than 3 inches. Mistreatment

may cause the pigtail to burst. (Refer to attached caution tag on each pigtail)

16 B20352 ECN-11293 (0201)

Trouble-Shooting

SYMPTOM PROBABLE CAUSE REMEDY OR CHECK

PRIMARY REGULATOR Venting at relief valve. Over pressure due to creeping or Replace regulator seat faulty regulation of primary regulator. and nozzle components.

Gas leakage around Loose bonnet. Tighten bonnet. regulator body and bonnet Diaphragm leak. Replace diaphragm.

Required gas flow not available. Line regulator not set correctly. Set delivery pressure per specifications. Flow capacity too high. Reduce flow capacity.

LINE PRESSURE REGULATOR Gas leakage around regulator Loose bonnet. Tighten bonnet. body/bonnet.

Pipeline not at desired pressure. Line regulator not set correctly. Set delivery pressure per specifications.

SOLENOID VALVES Gas leakage through a closed Solenoid faulty. Replace solenoid. solenoid. Power not reaching the solenoid. Check all wiring connections.

Electrical System No indicator lights or displays Power Input. Check electrical power supply. on front panel come on when power is hooked up. Internal wiring disconnected. Check all wiring connections. Manifold controller PCB defective. Replace manifold controller PCB.

Red indicator light(s) on but Master valve, header valves, or Slowly open valves. both banks are full. (green light cylinder valves on bank are closed. on one bank is on) Bank pressure below minimum inlet Replace cylinders. pressure requirements.

17 B20352 ECN-11293 (0201)

Trouble-Shooting

SYMPTOM PROBABLE CAUSE REMEDY OR CHECK

Electrical System (continued) Red indicator light does not come LED defective Replace manifold controller PCB. on when one bank is empty and changeover occurs.

Green indicator light does not Manifold controller PCB defective. Replace manifold controller PCB. come on even though both banks are full. Pressure switch wiring incorrect or Check pressure switch wiring. disconnected. Pressure switch set at too high a Adjust pressure switch. pressure. Primary regulator set at too low a Adjust primary regulator delivery pressure. pressure.

Display reads “0” even when Pressure transducer wiring Check pressure transducer pressure is present. disconnected or faulty. and controller board connections. Pressure transducer faulty. Replace transducer.

Display incorrect. Dip switches set incorrectly. Check setting of the Dip switches. Pressure transducer faulty. Replace transducer.

One of the green indicators is on Non-volatile memory failure. Replace manifold controller PCB. and both red indicators are blinking.

No display and the green indicator Input out of range during calibration Adjust the line and primary is flashing. routine. regulators prior to calibration.

Both Green LEDs are on and both Pressure switch faulty. Replace the pressure switch. Red LEDs are on. (both banks pressurized) Pressure switch wiring disconnected. Check wiring connections. Wiring to pressure switch not correct. Check internal leads to the pressure switch. Pressure switch set to open above the Adjust the switch/regulator to the primary regulator setting. correct setting.

Display indicating incorrect units. Dip Switches must be set with Remove power, set DIP switches power off. turn power back on.

18 B20352 ECN-11293 (0201)

MANIFOLD MAINTENANCE & REPAIR PARTS NOTE: • Western manifold systems are designed and tested for optimal performance and adherence to safety specifica-

tions. We recommend the use of Western replacement components to maintain the standards of performance and the safety of the product.

REPLACEMENT PIGTAILS 24” Stainless Steel Flexible Braid with Check Valves PF-280CV-24 ................ CGA 280 for medical gas mixtures PF-320CV-24 ................ CGA 320 for Carbon Dioxide (CO2) Service PF-326CV-24 ................ CGA 326 for Nitrous Oxide (N2O) Service PF-63CV-24 .................. CGA 540 for Oxygen (O2) Service PF-92CV-24 .................. CGA 580 for Nitrogen (N2) Service PF-346CV-24 ................ CGA 346 for Compressed Air 24” Synthetic Fiber Braid Hose with Check Valve PFS-92CV-24 ............... CGA 580 for Helium (He) Service PCB REPLACEMENT PARTS WME-8-98 .................... Manifold Controller PCB PRESSURE GAUGES – 2” Diameter, 1/4” NPT Back Port WMG-3-3 ...................... 100 psi Line gauge FHM2, FHM2HL WMG-3-4 ...................... 400 psi Line gauge FHM2HP WMG-3-4 ...................... 400 psi Intermediate gauge VALVES AND VALVE REPAIR KITS WMS-1-53 .................... CGA 540 Check Valve Bushing WMS-1-59 ..........CGA 326 Check Valve Bushing WMV-2-16 .................... Master Valve WMS-1-62 ..........CGA 346 Check Valve Bushing RK-1085 ....................... Repair kit for WMV-2-16 WMS-1-54 ..........CGA 580 Check Valve Bushing RK-1041 ....................... Repair kit for low pressure check valves WMS-1-65 ..........CGA 320 Check Valve Bushing WMS-1-64 .................... CGA 280 Check Valve Bushing PRESSURE SWITCHES WME-4-4 ...................... Pressure Switch (all gases except Oxygen) WME-4-4C .................... Pressure Switch (Oxygen) POWER SUPPLY REPLACEMENT PARTS WMS-13-23 .................. Power Supply Assembly (transformer, PCB, case, and cable) WME-8-85 .................... Power Supply PCB (includes dry contacts for remote alarms) PRESSURE TRANSDUCERS WME-9-1A .................... 2500 PSIG inlet transducer FHM2, FHM2HL, FHM2HP WME-9-2A .................... 250 PSIG line transducer FHM2HP WME-9-3A .................... 100 PSIG line transducer FHM2, FHM2HL

19 B20352 ECN-11293 (0201)

MANIFOLD MAINTENANCE & REPAIR PARTS FHM2 SERIES REGULATORS AND REGULATOR REPAIR KITS FHM2 Series Primary Regulators WMS-14-8 ................ Left Primary Regulator for FHM2 (Oxygen & Medical Mixtures) WMS-14-9 ................ Right Primary Regulator for FHM2 (Oxygen & Medical Mixtures) WMS-14-26 .............. Left Primary Regulator for FHM2 (Air, He, N2) WMS-14-27 .............. Right Primary Regulator for FHM2 (Air, He, N2) WMS-14-28 .............. Left Primary Regulator for FHM2HL (CO2 & N2O ) WMS-14-29 .............. Right Primary Regulator for FHM2HL (CO2 & N2O) WMS-14-30 .............. Left Primary Regulator for FHM2HP (Air, He, N2) WMS-14-31 .............. Right Primary Regulator for FHM2HP (Air, He, N2) RK-1037 ................... Repair Kit for WMS-14-26, WMS-14-27, WMS-14-28, WMS-14-29, WMS-14-30 & WMS-14-31 (Primary Regulator) RK-1038 ................... Repair Kit for WMS-14-8 and WMS-14-9 (Primary Regulator) FHM2 Series Line Regulators WLR-14-50L ............. Line Regulator for FHM2 & FHM2HL (Air, He, CO2, N2O, O2, N2) WLR-14-50R ............ Right Line Regulator for FHM2 & FHM2HL (Air, He, CO2, N2O, O2, N2) WLR-14-200L ...........Left Line Regulator for FHM2HP (Air, He, N2) WLR-14-200R .......... Right Line Regulator for FHM2HP (Air, He, N2) RK-1160 ................... Repair Kit for WLR-14-50R (L) and WLR-14-200R (L) FHM2 Series Solenoid Valves 8423 ......................... Solenoid valve for FHM2 & FHM2HP (Air, He, O2, N2) 8422 ......................... Solenoid valve for FHM2HL (CO2, N2O, ) FHM2 Series Printed Circuit Boards-Calibrated WME-8-98A .............. PCB-Calibrated for FHM2 (Air, He, O2, N2) WME-8-98B .............. PCB-Calibrated for FHM2HL (CO2, N2O, ) WME-8-98C ............. PCB-Calibrated for FHM2HP (Air, He, O2, N2)

20 B20352 ECN-11293 (0201)

875 Bassett Road Westlake, Ohio 44145-1142 (440) 871-2160 FAX: (440) 835-8283

LIMITED WARRANTY

WARRANTY: The Seller expressly warrants that the products manufactured by it will be free from defects in material, workmanship and title at the date of shipment. This Warranty is exclusive and is IN LIEU OF ALL IMPLIED OR STATUTORY WARRANTIES (INCLUDING WITHOUT LIMITATION, WARRANTIES AS TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR ARISING FROM COURSE OF DEALING OF USAGE OR TRADE) or any other express or implied warranties or representations. All claims under this warranty must be made in writing and delivered to the Seller prior to the expiration of 1 year from the date of shipment from the factory, or be barred. Upon receipt of a timely claim, the Seller shall inspect the item or items claimed to be defective, and Seller shall at its option, modify, repair, or replace free of charge, any item or items which the Seller determines to have been defective at the time of shipment from the factory, excluding normal wear and tear. Inspection may be performed at the Seller´s plant and in such event, freight for returning items to the plant shall be paid by Buyer. Seller shall have no responsibility if such item has been improperly stored, installed, operated, maintained, modified and/or repaired by an organization other than the Seller. Adjustments for products not manufactured by Seller shall be made to the extent of any warranty of the manufacturer or supplied thereof. The foregoing shall be the Seller´s sole and exclusive liability and Buyer´s sole and exclusive remedy for any breach of warranty or for any other claim based on any defect, or non-performance of, the products whether based on breach of contract or in tort, including negligence or strict liability.